Banquette and geometry

joeboldtNovember 26, 2013

I'm building a banquette (or booth) off of my kitchen. Originally, I was going to make an oval booth with the back rest slanted. I planned on constructing a frame out of 3/4" plywood then building up layers of 1/8" bending plywood for the back rest. I've since come across the marvel of bent plywood which comes in a size I could use (in this case I need 2 - quarter circles with a radius of 4'-0") The problem I'm having, is figuring out how to cut it so the slope of the back rest is 7 degrees all the way around. There must be som e geometric formula somewhere that explains something like this, but I can't find it.

Any thoughts?


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You are making a segmented and truncated cone shape. There may even be a calculator online. You'd input the upper and lower radii, and the height, and it would spit out the radii of the arcs on the flat material (before bending). Seems like a simple thing for a spreadsheet to do.

Here is a link that might be useful:

    Bookmark   November 28, 2013 at 9:12AM
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Hey, thanks. That helps a lot!

    Bookmark   November 30, 2013 at 2:36PM
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